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lpfc: Add support for using block multi-queue

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With blk-mq support in the mid-layer, lpfc can do IO steering based
on the information in the request tag.  This patch allows lpfc to use
blk-mq if enabled. If not enabled, we fall back into the emulex-internal
affinity mappings.

This feature can be turned on via CONFIG_SCSI_MQ_DEFAULT or passing
scsi_mod.use_blk_mq=Y as a parameter to the kernel.

Signed-off-by: Dick Kennedy <dick.kennedy@avagotech.com>
Signed-off-by: James Smart <james.smart@avagotech.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
This commit is contained in:
James Smart
2015-05-22 10:42:38 -04:00
committed by James Bottomley
parent 953ceeda97
commit 8b0dff1416
4 changed files with 72 additions and 52 deletions
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4
drivers/scsi/lpfc/lpfc_init.c
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@@ -3303,6 +3303,7 @@ lpfc_create_port(struct lpfc_hba *phba, int instance, struct device *dev)
shost->max_lun = vport->cfg_max_luns;
shost->this_id = -1;
shost->max_cmd_len = 16;
shost->nr_hw_queues = phba->cfg_fcp_io_channel;
if (phba->sli_rev == LPFC_SLI_REV4) {
shost->dma_boundary =
phba->sli4_hba.pc_sli4_params.sge_supp_len-1;
@@ -8980,7 +8981,8 @@ lpfc_sli4_enable_msix(struct lpfc_hba *phba)
phba->cfg_fcp_io_channel = vectors;
}
lpfc_sli4_set_affinity(phba, vectors);
if (!shost_use_blk_mq(lpfc_shost_from_vport(phba->pport)))
lpfc_sli4_set_affinity(phba, vectors);
return rc;
cfg_fail_out: